JP4068687B2 - Variable position lock mechanism - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates generally to portable surgical instruments, and in particular to a new and beneficial locking mechanism for the handle of an endoscope portable instrument.
[0002]
[Prior art and its problems]
In minimally invasive surgery, an elongate shaft instrument is used through an access port like a trocar to grab, cut, incise, and manipulate tissue. These instruments have a handle located on the exterior of the body for the surgeon to control the end effector of the instrument. In general, these instruments are coaxial shafts that are used to seal against the trocar and transmit motion and force through the trocar to the end effector to perform functions such as cutting, grasping, or incising tissue. Have Typically, rotating knobs are associated with coaxial shafts to rotate these shafts. In addition, some portable instruments include accessory devices for monopolar and bipolar energy. Thus, these types of instruments typically have an electrical insulation over the coaxial shaft to protect the surgeon and the patient.
[0003]
With the strictness of minimally invasive surgery, portable instruments must be able to handle functions such as inherent ergonomics, control, and tactile feedback through the handle. These functions are essential for the surgeon to properly perform the surgical procedure. Minimally invasive surgical instruments that provide rough movement often complicate the procedure and often frustrate the surgeon because the surgeon is further isolated from the traditional tactile sensations and sensations of surgery normally associated with open surgical procedures.
[0004]
For some surgical procedures, the forceps function in a portable instrument is often required for the purpose of maintaining retraction or providing a fixed position operation. Clamping function is traditionally provided in surgical instruments used in open surgery and is considered an important feature in minimally invasive surgical procedures. Generally, these instruments have a saddle-type handle with a ledge on one actuator handle arm and a mating pawl on the other actuating handle arm. The latching action is S. 1,659,112 (Littlejohn) as described along the mid-sagittal plane of the instrument.
[0005]
Although it is important to note that this type of clamping method is effective against traditional or open surgical instruments, minimally invasive or laparoscopic instruments generally include a pistol-shaped handle, Make the clamping action of the type ineffective and difficult to handle. An alternative method for clamping a pistol grip of an endoscopic portable instrument is described in US Pat. S. 5,176,702 (Bales). In this design, the rack is attached to the bottom of the movable part of the handle and the lock pawl is attached to the bottom of the stationary part of the handle. When the two handle pieces are clamped together, the pawl and the rack engage and lock the handle in that position. The rack is released by moving the pawl from the rack using a camming mechanism. However, due to the undercut at the rack / claw interface, the pressure between the rack and the pawl is first reduced by bringing the movable handle part closer to the stationary part, thereby releasing. One major drawback to this type of handle lock mechanism that is of interest to surgeons is that the applied pressure and load are applied to the tissue held in the instrument end effector jaws to effect release. It is to be imposed on.
[0006]
Another method used to perform clamping in portable surgical instruments is described in U.S. Pat. S. 5,483,952 (Aranyi) and U.S. Pat. S. 5,476,479 (Green et al.), In which the rack is attached directly to an actuating member that transmits movement and force from the handle to the end effector. The pawl is placed on a stationary part of the handle and is movably engaged with the rack. When the pawl is driven towards the rack, it engages the rack teeth incrementally as the actuating bar is moved vertically during operation. The main drawback to this design is that the pawl must be coupled to a release trigger, although it has considerable mechanical advantages due to the high force required to release the pawl from the rack under load conditions. . Furthermore, in order to obtain a practical resolution in the locking mechanism and maintain the clamping pressure, very small teeth are used in the rack, or additional compliance is distal to the locking rack. Must be incorporated into the working assembly. Another drawback to this type of design is that the locking mechanism is limited to locking the actuation system in discrete or predetermined positions, usually 5-10 different positions. This requires the surgeon to select an excessively weak or strong clamping force.
[0007]
Another known portable instrument is characterized by U.S. Pat. S. 804,229 (Hutchinson) and U.S.A. S. 5,314,424 (Nicholas) is a lock design. Both of these references describe a locking mechanism that is directly locked to the actuating rod of the instrument. However, this type of locking arrangement is limited in resolution and requires the incorporation of additional compliance into the actuation assembly in order to be effective.
[0008]
To date, handle lock mechanisms for portable surgical instruments that overcome the disadvantages of the prior art devices described above are not known.
[0009]
[Means for Solving the Problems]
The present invention is a portable surgical instrument used in minimally invasive surgical procedures such as laparoscopic surgical procedures. The present invention is a portable surgical instrument comprising a handle body and an elongate shaft coupled to the handle body at the proximal end of the shaft. The end effector, such as a pair of movable jaws, is located at the distal end of the shaft. The end effector is any type of surgical end effector, such as forceps, scissors, grasshopper or the like. The present invention also includes an actuating handle member movably coupled to the handle body and is operably coupled to the end effector for causing movement of the end effector. Thus, the end effector is opened and closed like the movable jaw element by the operation of the handle operating member.
[0010]
In the handle body, a Z-shaped locking tab having a through-hole at one end, a pressing spring for maintaining the locking tab in the locking position, and the locking tab for release A locking mechanism is attached which consists of a release trigger acting against it. An arcuate locking bar having a smooth uniform surface is coupled at one end to the handle actuating member and passes through the hole in the locking tab so that the actuating locking bar is in movably contact with the locking tab. It can be inserted at the opposite end.
[0011]
The locking bar is positioned on the actuating member at a point radially spaced from the pivot point of the actuating member.
[0012]
The implementation of the locking bar in this position increases the resolution of the movement of the locking bar with respect to the movement of the actuating bar and improves the resolution and control of the locking position.
[0013]
Furthermore, the implementation of the locking bar in this position takes advantage of the natural compliance within the entire actuation system and further improves the resolution of the locking position.
[0014]
In addition, the implementation of the locking bar in this position improves the mechanical advantage of the force generated by the locking tab retained on the locking bar, improves the effectiveness of the locking mechanism, and performs the release. Reduce the required force.
[0015]
A release trigger is operably coupled to the locking tab to release contact between the arcuate locking bar and the locking tab. A pressure spring is included in the handle body to deflect the locking tab against the release trigger in the locking position.
[0016]
The locking tab is mounted in the handle body so as to freely rotate. Furthermore, the hole in the locking tab is larger than the diameter of the arcuate locking bar and is unidirectionally frictioned in the arcuate locking bar when disposed at an angle with respect to a line perpendicular to the tangent at the contact point with the locking bar. Provide a locking action. The Z-shaped configuration of the locking tab allows for a small layout within the handle body and provides an effective pivot point. Because the locking bar has a smooth surface and is not a grooved or toothed surface normally associated with rack and pawl designs in the prior art, it clamps at any position along the locking bar, Provide the surgeon with overall control of clamping force and pressure at any thickness of tissue. The smooth design of the mechanism also avoids debris accumulation or contamination retention.
[0017]
The release trigger is located outside the handle body and is arranged to move in a direction parallel to the longitudinal axis of the portable instrument. Because the locking tab is spring biased relative to the locking position, unlocking the locking tab is accomplished by depressing a trigger that presses the bottom portion of the locking tab. The Z-shape of the locking tab allows the locking tab to pivot, removes frictional locking force, moves the arcuate locking bar through the hole in the locking tab, and releases.
[0018]
The release trigger also has a notch and engages a protrusion on the handle body and serves as a trigger locking means. This is activated or released by moving the trigger in an up or down direction that is generally perpendicular to the longitudinal axis of the instrument at all lowered positions of the release trigger stroke. When activated, the release trigger is retained to hold the locking tab in the unlocked position, providing non-restrictive bi-directional operation of the actuation system.
[0019]
The present invention includes a finger ring in both the handle body and the handle actuating member. The finger resting portion extends below the finger ring in the handle body and engages the surgeon's little finger to the finger resting portion for improved instrument control and ergonomic effect.
[0020]
OBJECT OF THE INVENTION
It is an object of the present invention to provide a handle locking mechanism for a portable surgical instrument that allows total variability in the locking position of the end effector.
[0021]
Another object of the present invention is to provide a locking mechanism that prevents malfunction due to debris accumulation or contamination.
[0022]
Another object of the present invention is a handle chain that allows the end effector to be unlocked independently of the actuating handle so that when the release trigger is depressed, the lock unlocks without the need to move the actuating handle. It is to provide a locking mechanism.
[0023]
Another object of the present invention is to provide a handle locking mechanism with a smooth function and a quiet operation.
[0024]
Another object of the present invention is to provide a handle locking mechanism that allows the end effector of the instrument to be easily released in the user's fractionation.
[0025]
Another object of the present invention is to use the natural compliance of the actuation system to allow a user-controllable holding force at the end effector, thereby allowing for increased locking resolution. Is to provide.
[0026]
Another object of the present invention is to provide a handle locking mechanism that can be locked at any position along the stroke, as required by clinical application or surgeon preference.
[0027]
Another object of the present invention is to provide a handle locking mechanism for a portable surgical instrument that is simple to manufacture and easy to assemble.
[0028]
The various novel features that characterize the invention are pointed out with particularity in the appended claims, which form a part of this disclosure. For a better understanding of the invention, its operating advantages and specific purposes attained by its use, reference is made to the accompanying drawings and description, in which preferred embodiments of the invention are illustrated.
[0029]
Embodiment
As best shown in FIGS. 1 and 2, the present invention is a portable surgical instrument, generally designated 20, that is used in minimally invasive surgical procedures such as laparoscopic procedures. The instrument 20 includes a distal end effect, such as a handle 30, an elongated shaft 22 coupled to the handle 30, and a pair of movable jaw members 72 and 74 (FIG. 3) operatively coupled to the shaft 22 for grasping tissue. And an effector assembly 70. A rotating knive 23 is coupled to the shaft 22 and the handle 30 to rotate the shaft 22 and end effector assembly 70.
[0030]
As illustrated in FIG. 3, the shaft 22 is coated with an insulating material 24 to protect the surgeon and patient during use of the electrocautery method. The shaft 22 is coaxial, and an insulating layer 24 is superposed on the outer shaft 25, and the operating rod 26 is positioned so as to be movable. Jaw linkage assembly 78 includes actuating bar 26 and end effector such that when actuating bar 26 is slidably moved within shaft 22, jaw members 72 and 74 are opened and closed by movement about pivot pin 76. Coupled to assembly 70.
[0031]
As shown in FIG. 4, the handle 30 includes a handle body 32 and a handle operating section 40. The outer shaft 25 and the rotating knob 23 are coupled to the handle body 32. The handle main body 32 includes a body portion 33 in the upper section of the main body 32. The handle neck 34 extends downward and the lower finger ring 36 is coupled thereto. The main body 32 is divided along a mid-sagittal plane parallel to the longitudinal axis of the instrument 20 to form an upper cover 35 that covers the trunk 33 and the neck 34 of the main body 32. The finger ring 36 has a little finger rest 38 that extends from the bottom portion of the ring 36 to contact the surgeon's little finger. Finger rest 38 improves control and improves ergonomic aspects.
[0032]
As illustrated in FIGS. 4 and 5, the body 33 includes an attachment ring 27 that connects the outer shaft 25 to the body 32. The cautery pin 21 for the electrocautery method is in contact with the outer shaft 25 and penetrates the main body 32. The neck 34 includes a handle lock assembly 50 consisting of a lock tab 60, a release trigger 51, and a lock tab pressing spring 52. Further details of the lock assembly 50 are described below.
[0033]
The handle actuation section 40 includes an actuation finger ring 44. The actuating section 40 is pivotally coupled to the handle body 32 at the body 33, has a pivot hole 41 at the hub 42, and fits with the pivot column 35 at the handle body 32. The accessory assembly 80 pivotally couples the actuating bar 26 to the handle actuating section 40 such that the actuating bar translates in response when the actuating section 40 is moved about the pivot column 35. When the actuation section 40 is moved from the handle body 32, the actuation bar 26 is advanced longitudinally toward the end effector assembly 70, thereby opening the jaw members 72 and 74. When the actuation section 40 is moved toward the handle body 32, the actuation bar is retracted, thereby closing the jaw members 72 and 74.
[0034]
An arcuate locking rod 46 is fixed to the actuation section 40 at one end and is movably connected to the neck 34 of the body 32 at the opposite end. The locking bar 46 has an arcuate shape and is coplanar with the mid-sagittal plane of the actuation section 40. The locking bar 46 is attached to the operating section 40 at a point radially spaced from the pivot hole 41 and the hub 42 of the operating section 40.
[0035]
FIG. 6 shows the inside of the neck 34 of the handle body 32, where the neck 34 has an aperture 37 and a cavity 39 through which the locking bar 46 enters the neck cavity 39. . The neck 34 also has an arcuate shoulder 43 that abuts and guides the lock bar 46 as the actuation section 40 and the lock bar 46 are advanced toward the handle body 32. The shoulder 43 has a stop 45 for restricting the movement of the locking end 61 (FIG. 8) of the locking tab 60 to a position perpendicular to the tangent at the contact between the locking tab and the locking bar. The neck 34 also has a pivoting shoulder 47 around which the locking tab 60 (FIG. 8) rotates. A receptacle 48 is also located at the neck 34 to hold the locking tab pressing spring 52 (FIG. 5). The guide groove 49 is used to guide the lock release trigger 51 (FIG. 7), and the lock shoulder 53 is used to hold the lock release trigger 51 in the unlocked position.
[0036]
FIG. 8 illustrates a locking tab 60 that is a flat strip bent into a Z shape. The locking end 61 of the locking tab 60 has a hole 62 sized to allow the locking bar 46 to pass freely when the tab is perpendicular to the tangent to the locking bar 46, When making an angle with respect to a line perpendicular to the tangent to the lock bar, it restricts movement in one direction. Below the hole 62 is a first bend 63 of the Z-shaped tab 60 that forms the pivot point of the tab 60 when it contacts the pivot shoulder 47 of the neck 34. The lower portion 64 of the locking tab 60 includes a locking tab pressing spring 52 in connection with the receptacle 48 of the neck 34, and the lower portion 64 engages the spring 52.
[0037]
FIG. 7 shows a release trigger 51 having a slide member 54 and two guide shoulders 55 on both sides of the member 54. Guide shoulder 55 engages guide groove 49 in neck cavity 48 (FIG. 6). A pad 56 is located at the distal end of the release trigger 51 and protrudes from the neck 34 of the handle body 32 to accept a user's finger for actuation of the release trigger 51. The proximal end 57 of the release trigger 51 abuts the lower portion 64 of the locking tab 60 and opposes the pressing spring 52. Thus, as shown in FIGS. 9 and 10, the lower end 64 of the locking tab 60 is located between and contacts the proximal end 57 of the release trigger 51 and the pressure spring 52. The locking notch 58 is disposed on the upper portion of the trigger slide member 54 of the release trigger 51, and when the release member 51 is pushed, the slide member 54 is advanced into the cavity 39, and then the notch 58 is moved to the neck 34 of the handle body 32. A small upward movement is applied to the release trigger 51 as illustrated in FIG. 11, sized and positioned to engage the locking shoulder 53 in FIG.
[0038]
When assembled, the locking tab 60 is held in place between the proximal end 57 of the release trigger 51, the pivoting shoulder 47 and the locking shoulder 45 of the locking bar guide 43. The locking bar 46 passes through an aperture 37 in the neck 34 of the body 32 and a hole 62 in the locking tab 60. The locking tab 60 is pre-positioned at an angle with respect to a line perpendicular to the arc tangent of the locking bar 46, causing the tab 60 to be frictionally locked to the locking bar 46 and the locking bar from the body 32 of the device 20. 46 is prevented from being retracted. The lock bar shoulder 43 serves as a retaining wall for the lock bar 46 and helps hold the lock bar 46 in position.
[0039]
In use, the locking assembly 50 of the present invention is actuated by a surgeon when it is desired to grasp and / or fasten tissue. The surgeon may experience slight movement in the locking tab 60 due to friction of the locking rod 46 against the through-hole 62 of the locking tab 60, and as best shown in FIGS. The drive section 40 is driven toward the neck 34 of the handle body 32 so as to drive it to a position perpendicular to the tangent line. When the tab 60 approaches this vertical orientation, the locking bar 46 is free to move through the hole 62 in the locking tab 60 and move the handle actuation section 40 toward the handle body 32, and the end effector. The assembly 70 is closed on the desired tissue. By continuing to drive the actuation section 40 toward the handle body 32, the tissue is clamped by the jaw members 72 and 74 of the end effector assembly 70. This compression causes force to begin to accumulate in the instrument actuation system, for example, in the end effector assembly 70, linkage assembly 78, actuation rod 26, accessory assembly 80, actuation section 40, and trigger locking mechanism 50. Causes distortion in the operating system. This strain causes the locking bar 46 to move an additional distance through the locking tab 60, further increasing the force within the actuation system and increasing the clamping pressure in the tissue.
[0040]
When pressure is released from the handle actuation section 40, the residual force accumulated in the actuation system drives the actuation section 40 to its open position. When the locking bar 46 moves outward from the locking tab 60, the tab 60, which is supplemented by the deflection spring 52, rotates about its pivot point 63 and is a line perpendicular to the tangent to the arcuate locking bar 46. Is shifted to an angular position. This creates a frictional bond between the tab 60 and the locking bar 46, thereby preventing further movement of the locking bar 46. Only slight outward movement is permitted by the lock assembly 50 and is easily accommodated by residual strain in the actuation system. Binding is achieved until the release trigger 51 is depressed and the locking tab 60 is shifted to a vertical orientation with respect to the tangent to the arc of the locking rod 46, thereby reducing the binding to the locking rod 46 and releasing. Maintain efficacy.
[0041]
If the upward movement is applied to the finger pad 56 when the trigger 51 is fully depressed, the locking notch 58 engages the locking shoulder 53 and holds the locking tab 60 in the unlocked position. This allows for free bidirectional movement of the handle actuation section 40, i.e., movement away from and in contact with the handle body 32 as shown in FIG. If downward pressure is exerted on the pad 56, the release trigger 51 moves downward and releases the notch 58 from the shoulder 53, thereby returning the release trigger 51 and the locking tab 60 to the locked position. As a result, only the inward movement of the handle operating section 40 is allowed.
[0042]
An alternative aspect of the present invention is shown in FIG. 12, where the same reference numerals as used in FIGS. 1-11 are used to indicate the same or similar parts in the alternative embodiment. Elements common to both the alternative embodiment and the embodiment of FIGS. 1-11 are not shown in FIG. As best illustrated in FIG. 12, in an alternative embodiment according to the present invention, the handle actuation section 40 has a release trigger 151 slidably disposed within the actuation section 40 in the actuation finger ring 44. The proximal end of the release trigger 151 is located in the actuation finger ring 44, while the distal end 157 of the release trigger 151 is located in the actuation section 40 and contacts the pressure spring 170. Also, when the release trigger 151 is depressed, the pressure spring 170 contacts the wall 172 such that the distal end 157 of the trigger 151 compresses the spring 170 between the distal end 157 and the wall 172.
[0043]
Release trigger 151 also has an inclined surface 153 adjacent to distal end 157 of trigger 151. The inclined surface 153 of the release trigger 151 contacts the end 164 of the locking tab 160. The locking tab pressing spring 152 is located between the lower end 164 of the locking tab 160 and the outer wall 145 of the operating section 40.
[0044]
The locking tab 160 is Z-shaped and has an upper end or a locking end 161 facing the lower end 164. The locking tab 160 has an aperture 162 at the locking end 161 for passing the locking rod 146. The locking bar 146 is fixed at one end to the neck 34 of the handle body 32 and is slidable through the hole 137 of the operating section 40. Further, the butt surface 143 is located adjacent to the locking bar 146 in the actuation section 40 to guide the locking bar 146.
[0045]
This alternative embodiment locks the actuation system in the same manner as described in the previous paragraph. To release the lock, the surgeon depresses the release trigger 151 with his thumb, compresses the spring 170, and when the ramp 153 of the release trigger 151 is advanced past the lower end 164 of the lock tab 160, the lock The movement of the locking tab 160 causes the locking tab spring 152 to compress and pivots the locking tab 160 in a vertical orientation with respect to the arc tangent of the locking bar 146. This causes the locking bar 146 to move freely through the aperture 137 and hole 162 in the locking tab 160. Once the force is released from the release trigger 151 by the surgeon, the locking mechanism 150 returns to the locking position and frictionally engages the locking rod 146 at the hole 162 in the locking end 161 of the locking tab 160. The position of the locking tab 160 is shifted as shown.
[0046]
While this invention has been described in connection with the most preferred embodiment, those skilled in the art upon reviewing this detailed description will present a number of additional embodiments, as described in the claims below, as the scope and spirit of the invention. It will be readily apparent that it is well within.
[0047]
The main features and aspects of the present invention are as follows.
[0048]
1. The handle body,
An elongate shaft having a proximal end and a distal end and coupled to the handle body at the proximal end;
An end effector having at least one movable member located at the distal end of the shaft;
An actuating member movably coupled to the handle body and operatively coupled to the end effector to actuate the at least one movable member;
A locking tab on the handle body having a through hole;
A locking rod having a proximal end and a distal end and secured to the actuating member at the proximal end, wherein at least the distal end of the locking rod extends through the hole A locking bar movably engaged with the locking tab;
A surgical instrument comprising a release trigger operably coupled to the locking tab for releasing engagement of the locking bar and the locking tab.
[0049]
2. 2. The surgical instrument according to 1 above, wherein the locking bar has an arcuate shape.
[0050]
3. The surgical instrument according to 2 above, comprising a pressing spring in the handle body for pressing the locking tab against the release trigger.
[0051]
4). 4. The surgical instrument according to 3 above, wherein the handle body includes a finger ring.
[0052]
5. 5. The surgical instrument according to 4 above, wherein the handle body includes a finger resting portion under the finger ring.
[0053]
6). The surgical instrument according to 5 above, wherein the operating member includes a finger ring.
[0054]
7). The surgical instrument of claim 1, comprising a rotating member coupled to the shaft for rotating the shaft and the end effector.
[0055]
8). The surgical instrument according to 3 above, wherein the locking tab has a Z shape.
[0056]
9. The surgical instrument of claim 3, wherein the release trigger includes a locking section for releasably engaging the handle body.
[0057]
10. The surgical instrument of claim 9, wherein the locking tab is deflected at a locking position that limits movement of the locking bar.
[0058]
11. 9. The surgical instrument of claim 8, wherein the locking tab has a top section having the through hole, and a bottom section in contact with the pressure spring and the release trigger.
[0059]
12 The handle body,
An elongate shaft having a proximal end and a distal end and coupled to the handle body at the proximal end;
An end effector having at least one movable member located at the distal end of the shaft;
An actuating member movably coupled to the handle body and operably coupled to the end effector for actuating the at least one movable member;
A locking tab on the actuating member having a through hole;
A locking bar having a first end and a second end, the first end being fixed to the handle body, wherein at least the second end of the locking bar passes through the hole and the chain A locking bar movably engaged with the locking tab;
A surgical instrument comprising a release trigger operably coupled to the locking tab for releasing engagement of the locking bar and the locking tab.
[0060]
13. 13. The surgical instrument as described in 12 above, wherein the locking bar has an arcuate shape.
[0061]
14 14. The surgical instrument of claim 13, including a pressing spring in the handle body for pressing the locking tab against the release trigger.
[0062]
15. 15. The surgical instrument according to 14, wherein the handle body includes a finger ring.
[0063]
16. 16. The surgical instrument according to 15 above, wherein the handle body includes a finger resting portion under the finger ring.
[0064]
17. 17. The surgical instrument according to 16 above, wherein the actuating member includes a finger ring.
[0065]
18. 13. The surgical instrument of claim 12, including a rotating member coupled to the shaft for rotating the shaft and the end effector.
[0066]
19. 15. The surgical instrument as described in 14 above, wherein the locking tab is Z-shaped.
[0067]
20. 15. The surgical instrument of claim 14, wherein the release trigger includes a locking section for releasably engaging the handle body.
[0068]
21. 21. The surgical instrument of claim 20, wherein the locking tab is deflected in a locking position that limits movement of the locking bar.
[0069]
22. 20. The surgical instrument of claim 19, wherein the locking tab has a top section having the through hole and a bottom section in contact with the pressure spring and the release trigger.
[Brief description of the drawings]
FIG. 1 is a side view of a preferred embodiment of a laparoscopic instrument having a variable position handle locking mechanism.
2 is a plan view of the laparoscopic instrument of FIG. 1. FIG.
3 is a partially cross-sectional fragmentary side view of the distal end of the laparoscopic instrument of FIG. 1. FIG.
FIG. 4 is an isometric view of the proximal end of the laparoscopic instrument of FIG. 1 with the left handle cover in an exploded configuration to reveal the inner part.
FIG. 5 is a side view of the cross section of the center line with the left handle cover removed.
FIG. 6 is a left side upright view of the right side member of the handle, with the lower portion of the handle cut away and shown without internal parts for clarity.
7 is an isometric view of a release button incorporated into the laparoscopic instrument of FIG.
FIG. 8 is an isometric view of a spring lock incorporated into the laparoscopic instrument of FIG.
FIG. 9 is a left upright view of the handle portion of the laparoscopic instrument of FIG. 1 with the left cover removed to reveal the internal parts and their relationship to the instrument in all fastened and locked positions.
10 shows the handle portion of the laparoscopic instrument of FIG. 1 with the left side cover removed to reveal the inner parts and their relationship with the instrument in the half-open unlocked position when the instrument is in the open process. FIG.
FIG. 11: The left cover is removed to reveal the relationship between the inner parts and their instruments in an unlocked position that allows free manipulation of the handle and distal end without the assistance of a locking mechanism. FIG. 2 is a left-side upright view of the handle portion of the laparoscopic instrument of FIG.
FIG. 12 is a side view in a centerline section of an alternative embodiment of a laparoscopic instrument having a variable position handle locking mechanism with the right handle cover removed.
[Explanation of symbols]
20 instruments
22 Slender shaft
26 Actuating rod
30 Toride
32 body
70 End effector assembly

Claims (2)

A handle body having a locking shoulder;
An elongate shaft having a proximal end and a distal end and coupled to the handle body at the proximal end;
An end effector having at least one movable member located at the distal end of the shaft;
An actuating member movably coupled to the handle body and operatively coupled to the end effector to actuate the at least one movable member;
A locking tab in the handle body that is movable between a locking position and an unlocking position and has a through hole;
A locking rod having a proximal end and a distal end and secured to the actuating member at the proximal end, wherein at least the distal end of the locking rod extends through the hole A locking bar movably engaged with the locking tab;
A release trigger that is slidable linearly within the handle body;
The release trigger has a notch and is operably coupled to the locking tab to release the engagement of the locking rod and the locking tab from the locked position to the unlocked position. And
The notch is engageable with the locking shoulder of the body such that the locking tab moves to the unlocked position;
The actuating member moves freely in two directions ;
The lock bar has an arcuate shape,
A pressing spring in the handle body for pressing the locking tab against the release trigger;
A rotating member coupled to the shaft for rotating the shaft and the end effector;
The locking tab is Z-shaped;
The release trigger includes a locking section for releasably engaging the handle body;
The locking tab is deflected at a locking position that restricts movement of the locking bar;
The locking tab has a top section with the through-hole and a bottom section in contact with the pressure spring and the release trigger;
Surgical instrument characterized by that. The handle body,
An elongate shaft having a proximal end and a distal end and coupled to the handle body at the proximal end;
An end effector having at least one movable member located at the distal end of the shaft;
An actuating member movably coupled to the handle body and operably coupled to the end effector for actuating the at least one movable member;
A locking tab on the actuating member that is movable between a locked position and an unlocked position and has a through hole;
A locking bar having a first end and a second end, the first end being fixed to the handle body, wherein at least the second end of the locking bar passes through the hole and the chain A locking bar movably engaged with the locking tab;
An opening trigger having a bevel operatively coupled to the locking tab for releasing the engagement of the locking bar and the locking tab from the locked position to the non-locked position; ,
The locking tab is movable on the inclined surface such that the locking tab moves to the non-locking position;
The actuating member moves freely in two directions ;
The lock bar has an arcuate shape,
A pressing spring in the handle body for pressing the locking tab against the release trigger ;
A rotating member coupled to the shaft for rotating the shaft and the end effector;
The locking tab is Z-shaped;
The release trigger includes a locking section for releasably engaging the handle body;
The locking tab is deflected at a locking position that restricts movement of the locking bar;
The locking tab has a top section with the through-hole and a bottom section in contact with the pressure spring and the release trigger;
Surgical device characterized by that.

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